3,6-bis(4-nitrophenyl)-1,4,2,5-dioxadiazine

1-(4-nitrophenyl)-3a,4,5,9b-tetrahydrobenzo[e][1,2]benzoxazole

3-(4-nitrophenyl)-3a,4,5,9b-tetrahydrobenzo[g][1,2]benzoxazole

5-methyl-5-(nitromethyl)-3-(4-nitrophenyl)-4H-1,2-oxazole

3,5-bis(4-nitrophenyl)-4-oxido-1,2,4-oxadiazol-4-ium